U.S. patent number 6,926,558 [Application Number 10/727,606] was granted by the patent office on 2005-08-09 for modular jack.
This patent grant is currently assigned to TDK Corporation. Invention is credited to Tadashi Fukuda, Mutsumi Kinoshita, Hiroshi Sasai, Mitsutaka Yasuda.
United States Patent |
6,926,558 |
Sasai , et al. |
August 9, 2005 |
Modular jack
Abstract
A first terminal block having first terminals to be in contact
with terminals of a plug is incorporated in a housing. The first
terminals are exposed to an internal space portion 1e of the
housing, while the rear ends of the first terminals project at the
rear of the block. A second terminal block has second terminals to
be connected to a motherboard the modular jack should be attached
to. Electronic parts a are mounted on an internal board. The
internal board includes through-hole-like terminals or notch-like
terminals to which the first and second terminals and should be
soldered. Winding terminals of winding parts are inserted and
soldered to through holes of the internal board.
Inventors: |
Sasai; Hiroshi (Tokyo,
JP), Kinoshita; Mutsumi (Tokyo, JP),
Yasuda; Mitsutaka (Tokyo, JP), Fukuda; Tadashi
(Tokyo, JP) |
Assignee: |
TDK Corporation (Tokyo,
JP)
|
Family
ID: |
32463359 |
Appl.
No.: |
10/727,606 |
Filed: |
December 5, 2003 |
Foreign Application Priority Data
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Dec 6, 2002 [JP] |
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2002-354461 |
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Current U.S.
Class: |
439/620.04;
439/490; 439/676 |
Current CPC
Class: |
H01R
13/719 (20130101); H01R 24/64 (20130101) |
Current International
Class: |
H01R
13/719 (20060101); H01R 013/66 () |
Field of
Search: |
;439/620,676,490 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
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5-3415 |
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Jan 1993 |
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JP |
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9-326272 |
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Dec 1997 |
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JP |
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2001-43937 |
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Feb 2001 |
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JP |
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2001-68222 |
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Mar 2001 |
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JP |
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2001-126820 |
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May 2001 |
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JP |
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Primary Examiner: Nguyen; Truc
Attorney, Agent or Firm: Oblon, Spivak, McClelland, Maier
& Neustadt, P.C.
Claims
What is claimed is:
1. A modular jack comprising: a housing having an internal space
into which a plug should be inserted; a first terminal block
incorporated in said housing and integrally provided with first
terminals to be in contact with terminals of the plug, so that
front portions of said first terminals are exposed to said internal
space, while rear ends of said first terminals project at the rear
of said first terminal block; a second terminal block having second
terminals to be connected with a motherboard to which the modular
jack is attached; and an internal board mounted with electronic
parts and including through-hole-like or notch-like terminals to
which said first and second terminals are soldered, wherein said
second terminal block is incorporated on a back surface side of
said housing, while said internal board is provided between said
first terminal block and said second terminal block.
2. A modular jack according to claim 1, wherein said electronic
parts include at least one of a common mode choke coil and a
transformer.
3. A modular jack according to claim 1, wherein said electronic
parts include at least one of a resistor, a capacitor and a light
emitting diode.
4. A modular jack according to claim 1, wherein said electronic
parts include a winding part; and said internal board has through
holes to which terminals of said winding parts are inserted and
soldered.
5. A modular jack according to claim 1, wherein said first
terminals project out directly rearward from said first terminal
block and said second terminals are L-shaped.
6. A modular jack according to claim 1, further comprising a metal
cover covering outer surfaces of the modular jack.
7. A modular jack according to claim 1, wherein a plurality of
through-hole-like or notch-like terminals to which said first
terminals are inserted and soldered are arrayed in an upper portion
of said internal board; and a plurality of through-hole-like or
notch-like terminals to which said second terminals are inserted
and soldered are arrayed in a lower portion of said internal
board.
8. A modular jack comprising: a housing having an internal space
into which a plug should be inserted; a first terminal block
incorporated in said housing and integrally provided with first
terminals to be in contact with terminals of the plug, so that
front portions of said first terminals are exposed to said internal
space, while rear ends of said first terminals project at the rear
of said first terminal block; a second terminal block having second
terminals to be connected with a motherboard to which the modular
jack is attached; and an internal board mounted with electronic
parts and including through-hole-like or notch-like terminals to
which said first and second terminals are soldered, wherein said
first terminal block and said second terminal block are received
and incorporated in said housing so that connection portions of
said first and second terminals to said internal board project
rearward; said connection portions of said first and second
terminals are inserted and soldered to said through-hole-like or
notch-like terminals of said internal board; and a cover covering
said internal board therewith is provided on the back surface side
of said housing.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a modular jack including
electronic parts therein, and particularly relates to an RJ-45 type
modular jack to be used for connecting a LAN cable.
2. Discussion of the Background
For example, a related-art modular jack is disclosed in U.S. Pat.
No. 6,319,064. This modular jack is arranged so that a terminal
block is incorporated in a housing having an internal space to
which a plug should be inserted, and a block that receives
electronic parts is incorporated in the terminal block.
The terminal block includes not only first terminals to be brought
into contact with terminals of a plug but also second terminals to
be connected to a motherboard. The block has a box-like shape that
is incorporated on the back surface side of the housing, and that
is opened on the housing side (front) for receiving the electronic
parts. The upper surface of the block is formed as a connection
portion to the first terminals, while the lower surface of the
block is formed as a connection portion to the second terminals.
The block receiving the electronic parts is mounted on a bottom
plate portion of the terminal block extending at the rear thereof,
and incorporated in the bottom plate portion. Then, winding
terminals of the electronic parts are fitted into a groove provided
at the upper opening edge of the block and a groove provided at the
lower opening edge of the block respectively. The winding terminals
fitted into the grooves are soldered with the rear end portions of
the first terminals, and the second terminals, in the upper and
lower surface portions of the block receiving the electronic parts,
respectively.
In addition, another related-art modular jack having a different
structure from that of U.S. Pat. No. 6,319,064 is also known. In
this structure, in order to make assembling easier, not only
electronic parts but also a modular jack are mounted on one board,
and the board with the modular jack is covered with upper and lower
covers (see Japanese Patent Publication No. Hei-5-341
51(1993)).
In the modular jack disclosed in U.S. Pat. No. 6,319,064, there is
a problem that the soldering work is difficult particularly due to
the structure in which the block receiving the electronic parts is
mounted on and soldered with the second terminals to be connected
to a motherboard. Particularly, when the electronic parts include a
winding part such as a transformer or a common mode choke coil as
described above, there is a problem that soldering becomes more
difficult because the soldering has to be performed while the
second terminals and the winding terminals are aligned with each
other.
On the other hand, in the structure disclosed in Japanese Patent
Publication Hei-5-3415, there is a problem that the total structure
including the modular jack becomes large in size.
SUMMARY OF THE INVENTION
In consideration of the foregoing problems belonging to the related
art, it is an object of the invention to provide a modular jack
which is assembled easily and which can be arranged in a small
size.
According to the invention, there is provided a modular jack
including: a housing having an internal space into which a plug
should be inserted; a first terminal block incorporated in the
housing and integrally provided with first terminals to be in
contact with terminals of the plug, so that front portions of the
first terminals are exposed to the internal space, while rear ends
of the first terminals project at the rear of the first terminal
block; a second terminal block having second terminals to be
connected with a mother board the modular jack should be attached
to; and an internal board mounted with electronic parts and
including through-hole-like or notch-like terminals to which the
first and second terminals should be soldered.
When the electronic parts are mounted thus on the internal board,
and the first and second terminals are soldered with the internal
board, assembling becomes easy. In addition, the modular jack is
not mounted on the board mounted with the electronic parts but
arranged so that the terminal block is incorporated in the housing,
and the internal board is coupled with the terminal block. Thus,
the modular jack can be arranged in a small size.
The modular jack according to the invention is suitably applicable
to the case where the electronic parts include at least one of a
common mode choke coil and a transformer.
The modular jack according to the invention is suitably applicable
to the case where the electronic parts include at least one of a
resistor, a capacitor and a light emitting diode.
When the electronic parts include a winding part in the modular
jack according to the invention, it is preferable that the internal
board has through holes to which terminals of the winding parts are
inserted and soldered. When the winding terminals are inserted into
the through holes and soldered therewith in advance independently
of the terminals of the modular jack, the work of soldering the
winding terminals becomes easy.
The modular jack according to the invention can adopt a structure
in which the second terminal block is incorporated on the back
surface side of the housing, while the internal board is provided
between the first terminal block and the second terminal block.
Such a structure is advantageous in view of the number of parts
because the second terminal block serves as a cover for covering
the included parts.
As another structure of a combination of constituent parts of a
modular jack according to the invention, it is possible to adopt a
structure in which: the first terminal block and the second
terminal block are received and incorporated in the housing so that
connection portions of the first and second terminals to the
internal board project rearward; the connection portions of the
first and second terminals are inserted and soldered to the
through-hole-like or notch-like terminals of the internal board;
and a cover covering the internal board therewith is provided on
the back surface side of the housing.
With such a structure, the work of soldering between the internal
board and the first terminals and between the second terminals and
the internal board can be carried out at one time. Thus, the
assembling work can be performed efficiently.
In the modular jack according to the invention, it is preferable
that: a plurality of through-hole-like or notch-like terminals to
which the first terminals are inserted and soldered are arrayed in
an upper portion of the internal board; and a plurality of
through-hole-like or notch-like terminals to which the second
terminals are inserted and soldered are arrayed in a lower portion
of the internal board.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1A-1E show an embodiment of a modular jack according to the
invention, FIG. 1A being a front view, FIG. 1B being a plan view,
FIG. 1C being a back view, FIG. 1D being a side view, FIG. 1E being
a bottom view.
FIGS. 2A-2F show a housing constituting the modular jack shown in
FIGS. 1A-1E, FIG. 2A being a front view, FIG. 2B being a plan view,
FIG. 2C being a back view, FIG. 2D being a side view, FIG. 2E being
a bottom view, FIG. 2F being a sectional view taken on line Y--Y in
FIG. 2A.
FIGS. 3A-3C show a first terminal block constituting the modular
jack shown in FIGS. 1A-1E, FIG. 3A being a plan view, FIG. 3B being
a side view, FIG. 3C being a bottom view.
FIGS. 4A-4F show a second terminal block constituting the modular
jack shown in FIGS. 1A-1E, FIG. 4A being a front view, FIG. 4B
being a plan view, FIG. 4C being a back view, FIG. 4D being a side
view, FIG. 4E being a bottom view, FIG. 4F being a sectional view
showing the structure in which a second terminal is attached.
FIGS. 5A-5B show an internal board constituting the modular jack
shown in FIGS. 1A-1E, FIG. 5A being a front view, FIG. 5B being a
back view.
FIGS. 6A-6B show the modular jack shown in FIGS. 1A-1E, FIG. 6A
being a sectional view, FIG. 6B being a side view showing the state
where the modular jack is being assembled.
FIGS. 7A-7F show constituent parts in another embodiment of the
modular jack according to the invention, FIG. 7A being a side view
of a housing, FIG. 7B being a side view of a first terminal block,
FIG. 7C being a side view of a second terminal block, FIG. 7D being
a side view of an internal board mounted with electronic parts,
FIG. 7E being a front view of FIG. 7D, FIG. 7F being a side view of
a cover.
FIG. 8 is a sectional view of the modular jack shown in FIGS.
7A-7E.
FIG. 9 is a equivalent circuit diagram of an example of the
internal circuit board of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIGS. 1A-1E show an embodiment of a modular jack according to the
invention. FIG. 1A is a front view; FIG. 1B, a plan view; FIG. 1C,
aback view; FIG. 1D, a side view; and FIG. 1E, a bottom view. This
modular jack is constituted by a housing 1, a first terminal block
3 having first terminals 2, a second terminal block 5 having second
terminals 4, and an internal board 6 to be mounted with electronic
parts.
FIGS. 2A-2F show the housing 1. FIG. 2A is a front view; FIG. 2B, a
plan view; FIG. 2C, a back view; FIG. 2D, a side view; FIG. 2E, a
bottom view; and FIG. 2F, a sectional view taken on line Y--Y in
FIG. 2A. As illustrated in these views, the housing 1 has a bottom
plate portion 1a, left and right side plate portions 1b, and a
bridging portion 1c for linking the upper front portions of the
left and right side plate portions 1b and 1b with each other. In
addition, the housing 1 has an intermediate wall 1d rising upward
from the bottom plate portion 1a. Thus, an internal space portion
1e into which a not-shown plug should be inserted is formed in the
portion surrounded by the bottom plate portion 1a, the side plate
portions 1b, the bridging portion 1c and the intermediate wall
1d.
A plurality of grooves 1f to which the first terminals 2 should be
fitted are provided on the top of the intermediate wall 1d. In
addition, protrusions 1g for preventing the first terminal block 3
from dropping off are provided on the opposite sides of the top of
the intermediate wall 1d. In addition, a groove 1h to which the
first terminal block 3 should be slide-fitted is provided in the
inner surface of the upper portion of each side plate portion 1b. A
plurality of recess portions 1i to which the front end portions of
the first terminals 2 should be fitted fixedly are provided in the
rear surface of the bridging portion 1c.
A recess portion 1j with which the second terminal block 5 should
be linked is provided in the outer surface of each side plate
portion 1b so as to extend forward from its rear end. A protrusion
1k for preventing the second terminal block 5 from dropping off is
provided in each recess portion 1j. In addition, a link piece 1m
for fixing the second terminal block 5 is provided in the rear
portion of each side plate portion 1b so as to project rearward
from the lower portion of the side plate portion lb. A groove 1n is
provided in the surface opposite to each link piece 1m.
The bottom plate portion 1a has pins 1p for fixing the housing 1 to
a not-shown motherboard.
FIGS. 3A-3C show the first terminal block 3. FIG. 3A is a plan
view; FIG. 3B, a side view; and FIG. 3C, a bottom view. The first
terminal block 3 is made from resin, having intermediate portions
of the first terminals 2 embedded integrally with the block 3. The
first terminals 2 are to be brought into contact with terminals of
a not-shown plug to be inserted into the internal space portion 1e
of the housing 1, so as to be connected to the internal board 6. To
this end, each first terminal 2 is bent rearward at the portion
projecting from the front end of the first terminal block 3, so as
to form a contact portion 2a to be in contact with its
corresponding terminal of the plug. In addition, the rear portion
of each first terminal 2 is made to project rearward from the rear
end of the first terminal block 3, so as to form a connection
portion 2b to be connected with the internal board 6. In addition,
linear protrusions 3a for slide-fitting to the groove 1h of the
housing 1 are provided on the opposite sides of the first terminal
block 3. In addition, protrusions 3b to be locked in the
protrusions 1g of the housing 1 are provided on the opposite sides
of the lower surface of the first terminal block 3.
FIGS. 4A-4F show the second terminal block 5. FIG. 4A is a front
view; FIG. 4B, a plan view; FIG. 4C, a back view; FIG. 4D, a side
view; FIG. 4E, a bottom view; and FIG. 4F, a sectional view showing
the structure in which a second terminal is assembled. The second
terminal block 5 has a plurality of second terminals 4 incorporated
in a bottom plate portion 5a. The second terminals 4 serve to
establish connection between the internal board 6 and a not-shown
motherboard. Each second terminal 4 has an L-shape. As shown in
FIGS. 4E and 4F, a horizontal portion of the second terminal 4 is
inserted into a hole 5b provided in the bottom plate portion 5a of
the second terminal block 5 so as to extend in the front/rear
direction, and a vertical portion of the second terminal 4 is
fitted to the groove 5c. Thus, the second terminal 4 is fixed to
the second terminal block S.
The second terminal block 5 has a box-like shape whose front is
opened to receive electronic parts. In addition, an opening (5d) is
also provided on the top of the second terminal block 5 so that the
internal board 6 and the first terminals 2 can be soldered with
each other through the opening (5d).
In the second terminal block 5, link pieces 5e for slide-fitting to
the recess portions 1j provided in the outer surfaces of the side
plate portions 1b of the housing 1 are formed to project forward
from the opposite sides of the front of the second terminal block
5. In addition, holes 5f to be fitted to the protrusions 1k in the
recess portions 1j in order to prevent the second terminal block 5
from dropping off are provided in the link pieces 5e
respectively.
Linear protrusions 5g for slide-fitting to the grooves 1n of the
link pieces 1m of the housing 1 are provided on the opposite sides
of the bottom plate portion 5a.
FIG. 5A shows the front surface of the internal board 6, and FIG.
5B shows the rear surface of the internal board 6. In the upper
portion of the internal board 6, through-hole-like terminals 6a are
arrayed, to which the connection portions 2b at the rear ends of
the first terminals 2 should be inserted and soldered. In addition,
in the lower portion of the internal board 6, through-hole-like
terminals 6b are arrayed, to which the second terminals 4 should be
inserted and soldered. In this embodiment, as the electronic parts
to be mounted, a capacitor 7a and resistors 7b are mounted on the
front surface of the internal board 6, and transformers 7c and
common mode choke coils 7d are mounted on the rear surface of the
internal board 6 so as to be as high as the mean height of the
internal board 6.
An equivalent circuit diagram of the present embodiment is shown in
FIG. 9.
The winding terminals 8 of the transformers 7c and the common mode
choke coils 7d which are winding parts are inserted into the
through holes 6c provided between these parts 7c and 7d and the
through-hole-like terminals 6a in the upper portion or the through
holes 6d provided between these electronic parts 7c and 7d and the
through-hole-like terminals 6b in the lower portion, and soldered
therein. As shown in FIG. 5A, a conductor pattern 9 establishes
suitable connections between the electronic parts 7a and 7b or
between the electronic parts 7a and 7b and the through-hole-like
terminals 6a and 6b or the through holes 6c and 6d.
When this modular jack is assembled, the electronic parts 7a to 7d
are fixed to the internal board 6 in advance by soldering. In this
case, the terminals 8 of the transformers 7c and the common mode
choke coils 7d which are winding parts can be soldered through the
through holes 6c and 6d easily.
As for the first terminal block 3, the linear protrusions 3a on the
opposite sides of the first terminal block 3 are slide-fitted into
the grooves 1h of the housing 1, and the protrusions 3b on the
lower surface of the first terminal block 3 are locked in the
protrusions 1g of the housing 1 (see the sectional view of FIG.
6A). Thus, the first terminal block 3 is received fixedly in the
top opening portion of the housing 1. FIG. 6B shows this state.
On the other hand, the terminals 4 of the second terminal block 5
are inserted into the through-hole-like terminals 6b arrayed in the
lower portion of the internal board 6, and soldered therein in
advance, as shown in FIG. 6B. Then, as soon as the second terminal
block 5 is incorporated in the housing 1, the first terminals 2 are
inserted into the through-hole-like terminals 6a arrayed in the
upper portion of the internal board 6. At the same time, the link
pieces 5e on the opposite sides of the second terminal block 5 are
fitted into the recess portions 1j of the side plate portions 1b of
the housing 1 so that the holes 5f of the link pieces 5e are fitted
to the protrusions 1k. Thus, the second terminal block 5 fixed to
the housing 1 is prevented from dropping off. At the same time, the
linear protrusions 5g on the opposite sides of the bottom plate
portion 5a of the second terminal block 5 are fitted into the
grooves 1n of the link pieces 1m of the housing 1 so as to fix the
bottom portion of the second terminal block 5 to the housing 1.
After that, the first terminals 2 are soldered to the
through-hole-like terminals 6a by means of a soldering iron or the
like inserted from the top opening portion of the second terminal
block 5.
Incidentally, the modular jack assembled thus is covered with a
not-shown shielding metal cover. Excepting a front opening for
receiving the connector plug and a bottom surface, all outer
surfaces are covered by the metal cover.
In such a manner, the terminal block is divided into two blocks 3
and 5 on the plug terminal contact side and on the mother board
connection side. As a result, in comparison with the case where the
terminal block is integrated into one block, the degree of freedom
in assembling structure is increased so that the modular jack can
be miniaturized while assembling becomes easy.
In addition, since the through-hole-like terminals 6a and 6b making
connection with the terminals 2 and 4 are provided in the internal
board 6, the terminals 2 and 4 can be connected easily. Further,
since the electronic parts 7a to 7d are not received into any block
but mounted on the internal board 6, assembling becomes easy. In
addition, in comparison with the case where the modular jack is
mounted on a board, a connection device including the modular jack
can be miniaturized.
In addition, since the electronic parts 7a to 7d are mounted on the
internal board 6, and the first and second terminals 2 and 4 are
soldered with the internal board 6, assembling becomes easy. In
addition, the modular jack is not mounted on the board mounted with
the electronic parts but arranged so that the terminal blocks 3 and
5 are linked with the housing 1 of the modular jack, and the
internal board 6 is linked with the terminal blocks 3 and 5. Thus,
the modular jack can be arranged in a small size.
When the electronic parts 7c and 7d are winding parts, the winding
terminals 8 are inserted into the through holes 6c and 6d, and
soldered therein in advance. Then, the terminals 2 and 4 are
soldered with the internal board 6 in another process. Thus, not
only the work of soldering the winding terminals 8 but also the
work of soldering the terminals 2 and 4 to the internal board
become easy.
FIGS. 7A-7F are views showing constituent parts in another
embodiment of the modular jack according to the present invention.
FIG. 8 is a sectional view showing the state where the modular jack
has been assembled. In this embodiment, a first terminal block 30
having first terminals 2 and a second terminal block 50 having
second terminals 4 are incorporated in a housing 10. A link
structure similar to that of the aforementioned embodiment can be
adopted as the structure for linking the first terminal block 30
with the housing 10. That is, linear protrusions 30a provided on
the opposite sides of the first terminal block 30 are slide-fitted
into not-shown grooves provided in the inner surfaces of side
plates of the housing 10, while protrusions 30b of the first block
30 are locked in protrusions 10g provided in the top portion of an
intermediate wall 10d of the housing 10d so as to prevent the first
terminal block 30 from dropping off.
On the other hand, the following structure is adopted as the
structure for linking the second terminal block 50 with the housing
10. That is, protrusions 50a of the side surfaces of the second
terminal block 50 are slide-fitted into not-shown grooves provided
in the inner surfaces of side plate portions of the housing 10,
while protrusions 50b of the second terminal block 50 are locked in
protrusions 10q provided in the intermediate wall 10d of the
housing 10d so as to prevent the second terminal block 50 from
dropping off. The reference numeral 10p represents a pin for fixing
the housing 10 to a mother board.
The reference numeral 60 represents an internal board. An
electronic part 7e which is a winding part such as a transformer or
a common mode choke coil, and electronic parts 7f and 7g such as
capacitors or resistors are mounted on the internal board 60.
Notch-like terminals 60a and 60b are provided in the upper and
lower edges of the internal board 60. In addition, the internal
board 60 has through holes 60c and 60d to which winding terminals 8
of the winding part should be inserted and soldered. The reference
numeral 9 represents a conductor pattern for establishing suitable
connections among the electronic parts 7e to 7g, the through holes
60c and 60d, and the terminals 60a and 60b.
The reference numeral 11 represents a cover having a structure
whose front is open to be linked with a rear portion of the housing
10. A structure similar to the linking structure of the second
terminal block 5 in the aforementioned embodiment can be adopted as
the structure for linking the cover 11 with the housing 10. That
is, link pieces 11e of the cover 11 are fitted into recess portions
10j of side surfaces of the housing 10, and holes 11f of the link
pieces 11e are fitted to protrusions 10k of the recess portions
10j. Thus, the cover 11 is prevented from dropping off.
When the modular jack according to this embodiment is assembled,
the first and second terminal blocks 30 and 50 are incorporated in
the housing 10 in advance. Then, the internal board 60 mounted with
the electronic parts 7e to 7g is mounted and soldered so that the
first and second terminals 2 and 4 are fitted to the notch-like
terminals 60a and 60b respectively. After that, the cover 11 is
attached to the housing 10 from its rear so as to cover the
internal board 60 therewith.
With such a structure, the work of soldering between the internal
board 60 and the first terminals 2 and between the internal board
60 and the second terminals 4 can be carried out at one time. Thus,
the assembling work can be performed efficiently.
When the invention is carried out, electronic parts to be mounted
on the internal board may include electronic parts such as light
emitting diodes if necessary. When light emitting diodes are
mounted, only a circuit pattern thereof maybe provided on the
internal board 6 or 60, while a body portion thereof is provided in
the housing 1 or 10, or the like.
As has been described above, according to the invention, it is
possible to provide a modular jack which is easy to assemble and
which can be miniaturized.
* * * * *